package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 添加菜品
     * @param dishDTO
     */
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
//        插入一条菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        Long id = dish.getId();
//        插入n条口味

        List<DishFlavor> flavors = dishDTO.getFlavors();
        flavors.forEach(flavorss->{
            flavorss.setDishId(id);
        });
        if(flavors != null && flavors.size() > 0){
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {
//        判断当前菜品是否能够删除---是否存在起售中的菜品？？
        for (Long id : ids) {
            Dish dish = dishMapper.queryById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
//        判断当前菜品是否能够删除---是否被套餐关联了？？
        List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        System.out.println(setmealIdsByDishIds);
        if(setmealIdsByDishIds.size() > 0 && setmealIdsByDishIds != null){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        dishMapper.delete(ids);
        //        删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishId(ids);
    }
    /**
     * 根据id查询菜品和对应的口味
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.queryById(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getById(id);
        DishVO dishVO =  new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }
    /**
     * 修改菜品
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        List<Long> id = Collections.singletonList(dish.getId());

//        删除口味
        dishFlavorMapper.deleteByDishId(id);
//        添加口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        flavors.forEach(flavorss->{
            flavorss.setDishId(dishDTO.getId());
        });
        if(flavors != null || flavors.size() > 0){
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品停售起售
     * @param id
     * @param status
     */
    @Override
    public void updateStatus(Long id, Integer status) {
        Dish dish = dishMapper.queryById(id);
        dish.setStatus(status);
        dishMapper.update(dish);
//        如果是停售，还需要将相应的菜品包含的套餐也停掉

        if(status == StatusConstant.DISABLE){
            List<Long> ids = Collections.singletonList(id);
            List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
            if(setmealIdsByDishIds != null && setmealIdsByDishIds.size() > 0){
                for (Long setmealId : setmealIdsByDishIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }



            }


        }
    }

    /**
     * 根据菜品分类查找菜品
     * @param categoryId
     * @return
     */

    @Override
    public List<Dish> getBycategoryId(Long categoryId) {
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);
        List<Dish> dishes = dishMapper.getBycategoryId(dish);
        return dishes;
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getBycategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getById(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
